22891990 has 24 divisors (see below), whose sum is σ = 45294480. Its totient is φ = 8323920.

The previous prime is 22891987. The next prime is 22892021. The reversal of 22891990 is 9919822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8250 + ... + 10669.

It is an arithmetic number, because the mean of its divisors is an integer number (1887270).

Almost surely, 2^22891990 is an apocalyptic number.

22891990 is a deficient number, since it is larger than the sum of its proper divisors (22402490).

22891990 is a wasteful number, since it uses less digits than its factorization.

22891990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18948 (or 18937 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 22891990 is about 4784.5574507994. The cubic root of 22891990 is about 283.9408310908.

The spelling of 22891990 in words is "twenty-two million, eight hundred ninety-one thousand, nine hundred ninety".